Earthquake Early Warning(Japan) The Earthquake Early Warning (EEW) (緊急地震速報 ,Kinkyu- Jishin Sokuho-) is a warning which is issued just after an earthquake in Japan is detected. The warnings are issued mainly by Japan Meteorological Agency (JMA). JMA has two EEW schemes. One is for advanced users. The other is for the general public, which is mainly mentioned in detail in this article. Earthquake::EEW::Decoder supported 2 schemes.